Skip to main content

Table 2 Difference of GSI quantitative parameters between glioma recurrence and treatment-related changes

From: Dual-energy spectral CT quantitative parameters for the differentiation of Glioma recurrence from treatment-related changes: a preliminary study

GSI quantitative parameters

glioma recurrence

treatment related changes

P Value

Precontrast λHU

−0.007(− 0.477, 0.494)

−0.064(− 0.619, 0.310)

0.859

Precontrast Zeff

7.545 (7.353, 7.745)

7.520 (7.295, 7.653)

0.723

Precontrast Zeff-N

1.007 (0.996, 1.012)

1.005 (0.997, 1.012)

0.965

Precontrast IC

−0.108(−2.598, 2.649)

−0.375(− 3.33, 1.428)

0.790

Precontrast ICN

0.733 (0.509, 1.102)

0.969 (0.504, 1.086)

0.723

Venous phase λHU

1.426 ± 0.762

0.314 ± 0.373

< 0.001

Venous phase Zeff

8.034 ± 0.238

7.671 ± 0.151

< 0.001

Venous phase Zeff-N

1.058 ± 0.020

1.013 ± 0.024

< 0.001

Venous phase IC

7.319 ± 3.967

1.703 ± 2.049

< 0.001

Venous phase ICN

0.636(−2.140, 3.514)

0.827(− 0634, 1.740)

0.832

  1. All P values for group comparisons were obtained by t test
  2. Data in parentheses are medians with interquartile range